docs: fix "buidler" typos in Typeface.Builder am: 8aeade4629 am: f36f2de31a am: 88dce482e3 am: 7e20c36a51 am: c456bb309f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/9975934

Change-Id: I1514d78521931312933080d83a690238e76fb98d